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Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

62°F

17°C

Humidity 54%
Wind Speed S 7 mph
Barometer 29.98 in (1015.4 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 6 Oct 7:54 pm CDT
Extended Forecast for

Decatur Airport IL

  • Tonight

    Tonight: Clear, with a low around 50. South wind around 8 mph.

    Low: 50 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Southwest wind 8 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. North northwest wind 3 to 7 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77. North northwest wind 5 to 10 mph.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. North wind 5 to 7 mph becoming light and variable.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80. South southeast wind 7 to 11 mph, with gusts as high as 15 mph.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 55. South southeast wind 8 to 10 mph, with gusts as high as 15 mph.

    Low: 55 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 50. South wind around 8 mph.
Wednesday
Sunny, with a high near 84. Southwest wind 8 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 52. North northwest wind 3 to 7 mph.
Thursday
Sunny, with a high near 77. North northwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 48. North wind 5 to 7 mph becoming light and variable.
Friday
Sunny, with a high near 80. South southeast wind 7 to 11 mph, with gusts as high as 15 mph.
Friday Night
Mostly clear, with a low around 55. South southeast wind 8 to 10 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 56.
Columbus Day
Mostly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
A chance of showers. Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.88°W (Elev. 650 ft)
Last Update:
7:41 pm CDT Oct 6, 2026
Forecast Valid:
8pm CDT Oct 6, 2026-6pm CDT Oct 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation